Temperature regulator



July 17, 1928. 1,677,710

' A. DANIKER TEMPERATURE REGULATOR Filed Feb. 18, 1527 Patented July 17,1928.

4 ALFRED DKNIKJ'JR, 01F ZURICH, SWITZERLAND.

TEMPERA'LURE REGULATOR.

Application filed February 18, 19%7, Serial No. 169,338, and in GermanyFebruary 26, 1928.

The object of this invention is a temperature regulatorfor electricallyfed apparatus, in which the motion of the contact parts opening andclosing the current is induced by an element sensitive to temperature.

The invention is characterized by the fact that the free extremity ofthe sensitive element which is arranged to move between contacts of theelectric line is supported on a yieldingly mounted bodyin the shape ofan are. As soon as the oscillation of the free extremity of thesensitive element causes the latter to overstep the tippin point of thebody on which it is supported:

a sudden switching is obtained.

In the drawing the object of the invention is represented as an exampleof execution in a longitudinal section.

1 is the case, 2 the sensitive element or thermostatic strip, 3 and 4are the adjustable conductor contacts, 3 being electrically insulatedfrom the case 1, 5 and 6 a-re the line connections, 7 is a set-screw fortensioning the strip 2. In the example the free extremity of this stripis provided with a roller 8 supported on a spring bed 9. Instead of thespring 10 for instance, another elastic body could be employed, andinstead of the ball 9 a roller may be used, justas the roller 8 could bereplaced by a ball which would be mounted in a socket of the freeextremity of the strip 2. I

The action of these regulators is the known one. When the sensitivestrip 2 is heated, or cooled, it oscillates in the direction of thearrow, and as soon as the roller 8 has exceeded the tipping position,there is a sudden switching.

The strip 2 may possibly be constructed as a spring, so that the support9 need not be yieldingly mounted.

I I claim:

1; In a temperature regulator for electrically heated devices thecombination with a casing, two electric contacts mounted in the casingsubstantially opposite one another and one of which is insulated fromthe easing, a thermostatic strip in the casing and means for adjustingthe tension of said strip, said strip arranged between the con- 60tacts; of an anti-frictlon member mounted on one end of the strip and onanti-friction member mounted in the casing and cooperating with theformer member to produce rolling engagement during a snap action of thestrip from one contact to the other when the strip is heated, andmeansto provide relative yielding of one member with respect to the otherduring the movement of the strip.

2. In a temperature regulator for electrically heated devices, thecombination with a casing, two electric contacts mounted in the casingsubstantially opposite one another and one of which is insulated fromthe ass 66 ing, a thermostatic strip, anti-friction means arranged onthestrip and a device for adjusting the strip; of resiliently mounted meansfor engaging the aforesaid means, one of said means including a rollerand the other a ball,said ball and roller being maintained in contactand efi'ecting a snap action of the strip member from one contact to theother when heated.

In testimony that I claim the foregoing as my invention, I have signedmy name.

ALFRED DANIKER.

